package com.swpu.controller;

import com.swpu.common.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.UUID;

@Slf4j
@RestController
@RequestMapping("/common")
public class CommonController {

    @Value("${luomi.path}")
    private String basePath;

    @PostMapping("/upload")
    public Result<String> upload(MultipartFile file){

        String originalFilename = file.getOriginalFilename();
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));
        String fileName = UUID.randomUUID().toString()+suffix;

        //目录判断
        File dir = new File(basePath);
        if (!dir.exists()){
            dir.mkdir();
        }

        try {
            file.transferTo(new File(basePath+fileName));
        }catch (IOException e){
            e.printStackTrace();
        }
        return Result.success(fileName);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){
        log.info(basePath+name);
        try(
                BufferedInputStream bufferedInputStream = new BufferedInputStream(new FileInputStream(basePath+name));
                BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(response.getOutputStream())
        ) {
            int len = 0;
            byte[] bytes = new byte[1024];
            while ((len = bufferedInputStream.read(bytes)) != -1){
                bufferedOutputStream.write(bytes,0,len);
                bufferedOutputStream.flush();
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

}
